A 168-s X-ray pulsar in the small magellanic cloud observed with ASCA

被引：3
|
作者：
Yokogawa, J [1 ]
Torii, K
Kohmura, T
Koyama, K
机构：
[1] Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan
[2] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
[3] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2001年 / 53卷 / 03期
关键词：
pulsars : individual (AX J0052.9-7157; RX J0052.9-7158; XTE j0054-720); stars; emission-line; Be; stars : neutron; X-rays : stars;
D O I：
10.1093/pasj/53.3.L9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on the detection of 167.8 +/- 0.2s pulsations from AX J0052.9-7157 in the Small Magellanic Cloud with ASCA. The pulsations show an energy-independent sinusoidal profile. The X-ray spectrum has been described by an absorbed hard power-law (photon index similar to 0.7) with a luminosity of similar to 8.8 x 10(35) ergs(-1) at a distance of 60kpc. The position is determined to be (R.A., Dec.)(J2000) = (00(h)52(m)59.(s)2, -71 degrees 57 ' 58 "), with an error radius of similar to 30 ". We have found that a variable Be/X-ray binary RX J0052.9-7158 is located within the 30 " error circle, and is also located at the edge of the 10 ' error circle of the 169-s pulsar XTE J0054-720. We therefore conclude that these are the same source, a Be/X-ray binary pulsar.
引用
收藏
页码：L9 / L12
页数：4
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